<template>
    <div class="app-container">
        <!-- 查询/分页 TO DO 需和后端配合-->
        <!--查询表单-->
        <el-form :inline="true" class="demo-form-inline">
        <el-form-item>
            <el-input v-model="courseQuery.title" placeholder="课程名称"/>
        </el-form-item>

        <el-form-item>
            <el-select v-model="courseQuery.status" clearable placeholder="课程状态">
            <el-option value="Normal" label="已发布"/>
            <el-option value="Draft" label="未发布"/>
            </el-select>
        </el-form-item>

        <el-form-item label="添加时间">
            <el-date-picker v-model="courseQuery.begin" type="datetime" placeholder="选择开始时间" 
            value-format="yyyy-MM-dd HH:mm:ss" default-time="00:00:00"/>
        </el-form-item>
        <el-form-item>
            <el-date-picker v-model="courseQuery.end" type="datetime" placeholder="选择截止时间" 
            value-format="yyyy-MM-dd HH:mm:ss" default-time="00:00:00"/>
        </el-form-item>

        <el-button type="primary" icon="el-icon-search" @click="getList()">查询</el-button>
        <el-button type="default" @click="resetData()">清空</el-button>
        </el-form>

        <!-- 课程表格 -->
        <el-table :data="list" border fit highlight-current-row>

            <el-table-column label="序号" width="100" align="center">
                <template slot-scope="scope">
                {{ (page - 1) * limit + scope.$index + 1 }}
                </template>
            </el-table-column>
            
            <el-table-column prop="title" label="课程名称" width="200" align="center" />

            <el-table-column label="课程状态" width="80" align="center">
                <template slot-scope="scope">
                {{ scope.row.status==='Normal'?'已发布':'未发布' }}
                </template>
            </el-table-column>

            <el-table-column prop="lessonNum" label="课时数" width="80" align="center" />

            <el-table-column prop="gmtCreate" label="添加时间" width="160"/>

            <el-table-column prop="viewCount" label="浏览量" width="100" align="center"/>
            
            <el-table-column label="操作" width="220" height="300" align="center">
                <template slot-scope="scope">
                    <router-link :to="'/course/info/'+scope.row.id" >
                        <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程基本信息</el-button>
                    </router-link>
                   
                    <!-- <router-link :to="'/course/chapter/'+scope.row.id">
                        <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程大纲</el-button>
                    </router-link> -->
                    <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeCourse(scope.row.id)">删除课程信息</el-button>
                </template>
            </el-table-column>
        </el-table>

        <!-- 分页 -->
        <el-pagination :current-page="page" :page-size="limit" :total="total"
        style="padding: 30px 0; text-align: center;" layout="total, prev, pager, next, jumper"
        @current-change="getList"/>

    </div>
</template>

<script>
import course from '@/api/edu/course'

export default ({
    data() {         
      return{
          list:null,  //查询之后接口返回的结果
          page:1,       //当前页
          limit:5,      //每页记录数
          total:0,        //总记录数
          courseQuery:{}     //条件封装对象
      }  
    },
    created(){   
        this.getList()
    },
    methods:{    
        //课程列表的方法
        getList(){
            course.getListCourse()
                .then(response=>{
                    
                   this.list = response.data.list
                   this.total = this.list.length
                })
                .catch(err=>{
                    console.log(err)
                })
        },
        //清空查询条件
        resetData(){  
            //表单输入项数据清空
            this.courseQuery = {}
            //查询所有讲师数据
            this.getList()
        },
        //删除课程
        removeCourse(courseId){
            this.$confirm('此操作将删除章节，是否继续？','提示',{
            confirmButtonText:'确定',
            cancelButtonText:'取消',
            type:'warning'
            })
                .then(()=>{   //点击确定，执行then方法
                //调用删除的方法
                course.removeCourse(courseId)
                    .then(respone=>{   //删除成功
                        //提示信息 
                        this.$message({
                            type:'success',
                            message:'删除成功！'
                        });
                        //刷新页面
                        this.getList()
                    })
                })  //点击取消，执行catch方法
                .catch((respone)=>{
                    //刷新页面
                    this.getList()
                })       
        }
    
    }
})
</script>
<style scoped>
   .el-button--mini, .el-button--mini.is-round{
    
      margin: 5px; 
   }
</style>

